Dual Option Mount, 6" (Cream) Features: 6" (152.4mm) overall mount length Includes two mounting bases that screw easily into the machined aluminum alloy shaft [0.875" (22.2mm) in diameter] Use the Tri-Foot Base [4" (101.6mm) outside diameter with three 0.265" (6.7mm) holes on a 3.25" (82.5mm) bolt circle] for solid surfaces, or the T-Bar Clip for drop ceiling rails Full range of motion at the camera: 210 degree Tilt, 360 degree Turn & 360 degree Rotation Knob and tamper-resistant set-screw adjusting options included 1/4-20 mounting stud with lockring